CN2631149Y

CN2631149Y - Dialing-accessing blocking-up apparatus

Info

Publication number: CN2631149Y
Application number: CNU032318219U
Authority: CN
Inventors: 赵俊彪
Original assignee: FUGAO DIGITAL INFORMATION TECHNOLOGY Co Ltd SHANGHAI
Current assignee: FUGAO DIGITAL INFORMATION TECHNOLOGY Co Ltd SHANGHAI
Priority date: 2003-06-04
Filing date: 2003-06-04
Publication date: 2004-08-04
Anticipated expiration: 2013-06-04

Abstract

The utility model provides a blocking device for dialing online, including a signal detection device (33) which is used for detecting whether the working mode of a user telephone is dialing online, a blocking treatment device (34) by which the signal of online can be instantaneously interrupted as well as a main control circuit (35) which is used for coordinating the working of every component; the main control circuit is operated according to the state of the signal detection device (33), when the indicated state of the signal detection device (33) is the dialing online, the signal of online can be interrupted by the blocking treatment device (34) which is driven by the main control circuit (35). Thus the dialing online of the computers of office network and private network through MODEM can be effectively prevented.

Description

Blocking equipment dials up on the telephone

Technical field

The utility model relates to a kind of blocking equipment that dials up on the telephone.

Background technology

The Internet is a much progress of scientific development, for our work and study and life brings great convenience.But also, those have brought inconvenience simultaneously for needing the unit of information privacy.For this reason, many units have to set up the independently network systems of overlapping mutually more: the Internet is walked in contact with foreign countries, routine office work office automation net, special sector's private network.For the consideration of information security, the three can not intercommunication.Therefore the situation that one people uses three computers to surf the Net has respectively simultaneously just appearred.

But so and fail thoroughly to deal with problems, be connected in the computer on office net and the private network, still can insert the Internet with the mode that phone dials up on the telephone by Modem.In a single day and connect the Internet, in fact also just equal office net and private network are linked on the Internet.For this reason, units concerned repeat injunctions, and the computer expert on forbid handling official business net and the private network crosses Modem and dials up on the telephone.But this thing still remains incessant after repeated prohibition, and causes a lot of serious leakages of a state or party secret.

So the method that installs special-purpose software on computers additional and the online of stored-program control exchange limited dialing is provided has just been arranged.

Because special method software is installed on the user computer, the user can freely select to use and close, so this method can't be proved effective.

Provide stored-program control exchange restriction Outgoing Number can only solve extension set and transfer to several known ISP to connect restricted problem, uncontrollable at all for modes such as a large amount of cards of surfing Internet, callback services, then powerless especially to a large amount of straight line users.

Summary of the invention

Technical problem to be solved in the utility model provides the blocking equipment that dials up on the telephone that a kind of limited subscriber as required utilizes telephone wire to dial up on the telephone.

This scheme is at (between telecommunication department and the subsets) on the subscriber's telephone line, insert the blocking equipment that dials up on the telephone by multiple connection (serial or parallel connection), under the situation that does not influence user's regular traffic (speech and fax), whether detect its working method for dialling up on the telephone, if find that the user dials up on the telephone by Modem, this blocking equipment that dials up on the telephone will in time be blocked (short circuit or open circuit) online signal, till communication line is hung up, make the user can't successfully insert the Internet.

The described blocking equipment that dials up on the telephone comprises: whether the working method that is used to detect subsets is the signal supervisory instrument that dials up on the telephone; But the blocking processing device of moment blocking-up online signal; Be used to coordinate the governor circuit of the work of each parts; Described governor circuit is operated according to the state of signal supervisory instrument, when the signal supervisory instrument indicating status when dialling up on the telephone, governor circuit notice blocking processing device blocking-up online signal then.

So just can stop computer expert on office net and the private network to cross MODEM effectively dials up on the telephone.

Description of drawings

Fig. 1 is a user mode figure of the blocking equipment that dials up on the telephone of the present utility model.

Fig. 2 is the theory diagram of the blocking equipment that dials up on the telephone of the present utility model.

Specific embodiments

As shown in Figure 1: on subscriber's line, be between the telecommunications stored-program control exchange 1 and subsets 2 of telecommunication department, by high resistant and connect mode access dial online blocking equipment 3, the described blocking equipment 3 that dials up on the telephone can detect user's operating state, when using phone and the facsimile service blocking equipment 3 that dials up on the telephone, the user is failure to actuate, when detecting the user and dial up on the telephone by Modem, the blocking equipment that dials up on the telephone 3 short time short circuit subscriber's line causes user's on-hook that goes offline.

As shown in Figure 2: the described blocking equipment 3 that dials up on the telephone comprises high resistant spacer assembly 31, A/D converter 32, signal supervisory instrument 33, blocking processing device 34, governor circuit 35.Subscriber's telephone line is earlier through high resistant spacer assembly 31, makes the blocking equipment that dials up on the telephone with user telephone line being connected physically not take place.High-barrier from after the circuit analog signal submit A/D converter 32 after treatment to, make it become digital signal, detect for signal supervisory instrument 33, signal supervisory instrument 33 judges whether its operating state is the mode of dialling up on the telephone, and notifies governor circuit 35.Governor circuit 35 according to the state of signal supervisory instrument indication operate, when signal supervisory instrument indication current state when dialling up on the telephone, the notice blocking processing device 34 blocking-up signals of surfing the Net.

1, the high resistant spacer assembly 31

The impedance of ordinary telephone wiring is very little, and high resistant spacer assembly 31 adopts the resistance that inserts hundreds of K even several million, also can make these 3 pairs of user's communications of blocking equipment that dial up on the telephone have no effect by the user-isolated circuit of method of audio frequency coupling.

2, A/D converter

What carry on the ordinary telephone wiring is analog signal, is digital signal and the blocking equipment 3 that originally dials up on the telephone is used for input, need be digital signal with analog signal conversion therefore.

3, signal supervisory instrument

What carry on the ordinary telephone wiring has voice, fax and data (modulation) signal.Fax and data belong to carrier signal.Handle through DSP through the signal after the A/D conversion, distinguish voice, fax and data type by carrier wave detection and signal demodulation.

4, blocking processing device

When detecting current circuit and be Internet data, can adopt the method for instantaneous short circuit or disconnect user circuit, make and cause the interruption of getting in touch between switch and the user user's on-hook, thereby stoped the user's data communication process.

5, governor circuit 35

Governor circuit 35 is used to coordinate the work of whole system each several part.Governor circuit 35 according to the state of information detector indication operate, when signal supervisory instrument indication current state when dialling up on the telephone, the notice blocking processing device 34 blocking-up signals of surfing the Net.

Claims

1, a kind of blocking equipment that dials up on the telephone is characterized in that, comprising:

Whether the working method that is used to detect subsets is the signal supervisory instrument (33) that dials up on the telephone;

But the blocking processing device (34) of moment blocking-up online signal;

Be used to coordinate the governor circuit (35) of the work of each parts; Described governor circuit (35) is operated according to the state of signal supervisory instrument (33), when signal supervisory instrument (33) indicating status when dialling up on the telephone, governor circuit (35) notice blocking processing device (34) blocking-up online signal then.

2, the blocking equipment that dials up on the telephone according to claim 1 is characterized in that, this equipment also comprises: be used for the high resistant spacer assembly (31) of user-isolated circuit, make this equipment not have influence to user's communication.

3, the blocking equipment that dials up on the telephone according to claim 1 is characterized in that, this equipment also comprises: being used for analog signal conversion is the A/D converter (32) of digital signal.